Planooraph co



T. DIXON.

MEANS FOR OPERATING SWITCHES FOR TRAM ROADS IN NHNES, QUkRRIES, OR THELIKE.

APPLICATION man nov. 29. ms.

1 ,3 13, 586. Patented A 919' ms COLUMBIA PLANOGRAPH co-. WASHINGTON, n.c.

UNITED STATES PATENT OFFICE.

THOMAS DIXON, OF LANGLEY PARK, ENGLAND.

MEANS FOR OPERATING- SWITGHES FOR TEAM-ROADS IN MINES, QUARRIES, OR THELIKE.

Specification of Letters Patent.

Application filed November 29, 1918. Serial No. 264,753.

To all whom it may concern:

Be it known that I, THOMAS DIXON, a subject of the King of GreatBritain, and resident of 17 Langley street, Langley Park, in the countyof Durham, England, have invented certain new and useful Improvements inor Relating to Means for Operating Switches for Tram-Roads in Mines,Quarries, or the like, of which the following is a] specification.

This invention relates to means for operating facing points in which a Tshaped lever is adapted to be moved by a passing vehicle, the stem ofthe T lever being pivoted to a bar joining the tongues of the switch.

The object of this invention is to provide an improved apparatus of thistype for automatically operating switches so as to divert tubs, bogies,or other vehicles, alternatively, one to one road, and another toanother road. Apparatus made in accordance with this invention ischaracterized in that the cross arms of the T shaped lever are connectedby links to cranks mounted on a shaft on which is also mounted a spokedwheel adapted to be given two quarter turns by the axles of a vehiclestriking the spokes as the vehicle passes over the shaft.

Referring to the drawings Figure 1 is a plan of one form of apparatusmade in accordance with this invention.

Fig. 2 is an elevation.

a a are the tram rails, b, b the switch rails or points, 0 the crossbarconnectin the points. 03 is a T shaped lever mounted on a stand 6. Thestem f of the T shaped lever is connected to the cross-bar a, by a pinf, a slot f being provided in the stem of the T bar to allow of therotation of the stem. To each cross arm of the T shaped lever isconnected a link g. Between the rails of the track is disposed a frame hon which is mounted a square shaft j carrying at each end a crank k k.On the shaft 7' is a hub provided with four spokes n 12.. Each crank 70la is connected to the links 9 by a connecting rod 0.

In use, as the vehicle passes over the frame h the axles engage thespokes n n and each gives the crank '70 quarter turn, two quarter turnsmoving the points from one extreme position to the other. truckconsequently shifts the points from one piston to the other before itreaches the points. Alternate self acting switches are not new per 86.

What I claim as my invention and desire to secure by Letters Patent isMeans for operating facing points of a track by a pair of axles of apassing vehicle comprising a bar joining the tongues of the points, apivoted T shaped lever disposed horizontally between the rails of thetrack, the stem of the T lever being connected to said bar by a pin andslot connection, a horizontal shaft mounted between the rails of thetrack, two cranks and a four spoke hub on said shaft and linksconnecting said cranks to the cross arms of the said T lever.

In testimony whereof I have signed my name to this specification.

THOMAS DIXON.

Copies 01' this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

' wellington, ID. 0."

Patented Aug. 19, 1919.

Each

